Improvement in apparatus for pulverizing metalliferous quartz



2 Sheets-Sheet 1. S. F. HODGE. v Apparatus for PulverizingMetalllferqus Quartz &c.

No. 214,659. Patented April 22, 1879.

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UNITED STATES Parngrqnr'icn.

SAMUEL F. HODGE, OF DETROIT, MICHIGAN.

IMPROVEMENT IN APPARATUS FOR PULVERIZING METALLIFEROUS QUARTZ, &c.

Specification forming part of Letters Patent No. 214,659, dated April 22, 1879; application filed February 14, 1879.

To all whom it may concern:

Be it known that I, SAMUEL F. Hones, of Detroit, in the county of Wayne and State of Michigan, have invented certain Improvements in Apparatus for Pulverizing Metalliferous Quartz, Gravel, or Sand, concentrating the metallic particles in the same, and rolling said particles into pellets, of which the fol- This invention relates to certain improvements in apparatus for reducing and pulverizin g metalliferous quartz, gravel, or sand, and concentrating the metallic particles contained therein, so that they can be subsequently separated with facility.

In the stamping and grinding mills usually employed for this purpose, the metallic particles are disintegrated an d com minuted to such an extent that they cannot be thoroughly sepa rated by the ordinary methods, such as by amalgamation, sluice-washing, or otherprocess.

The object of my invention is to obviate these defects, and providea means by which, while the quartz, pebbles, and sand are broken up and pulverized, the metallic portions will be concentrated and rolled together into pellets, that may be easily separated subsequently.

To this endmy invention consists in an ap paratus for pulverizing quartz, gravel, or sand, consisting of an inverted rotating conical rubber mounted within a conical pan, the sides of the rubber and pan converging toward each other from the top to a point near the bottom, from which point the space between the rub her and pan is uniform to the discharge-opening, whereby the silicious portions of the material are gradually broken up and reduced to powder within the converging space, while the metallic portions thereof are rolled into pellets within the uniform space, substantially as specified.

1n the drawings, Figure 1 represents a vertical elevation of my improved apparatus, partly in section. Fig. 2 represents a detached view of a section of the device for distribut ing the pulverized material with the metallic pellets to a suitable receptacle. Fig. 3 represents a detached view of the annular conductor for conveying the material as it is discharged from the apparatus to the receptacle for the same. Figs. 4 and 5 represent a deiached sectional and plan view of the device for distributing the material to be pulverized to the space between the rubber and pan. Fig. 6 represents a side elevation of the apparatus, showing the devices for securing the adjusting-lever in dotted lines; and Figs. 7 and 8, detached views of the elevating-lever and their connections detached.

The letter A represents a frame constructed. of suitable material, carrying the working parts of the apparatus. B represents atransverse horizontal shaft journaled on the top of the frame, and'provided at one end with fast and loose pulleys G G, by means of which the apparatus may be thrown into and out of operation, and at the other end with a fly-wheel, S. The letter D indicates a beveled gear wheel mounted on the shaft B, and intermeshing with a beveled-gear wheel, D, mounted on a vertical shaft, E, journaled near its upper end in the top of the frame A, and at its lower end on a spindle'head, J, mounted on a jack-screw, L, which is supported in a screwbearing at the lower portion of the apparatus.

Said screw is provided with a nut, K, by means of which it can be elevated or lowered. The letter F indicates an inverted conical rubber mounted rigidly upon the vertical shaft E, so as to turn it. G indicates a conical pan rigidly secured to the frame A. The conical rubber is adapted to rotate within the pan G. The sides fg of the conical rubberand pan converge toward each other from the top to a point near the bottom, from which point the space between the rubber and pan is uniform to the discharge-opening, as indicated at It 2'.

The outer wall or face of the conical rubber at the top is extended perpendicularly upward,

as indicated at h, forming an enlarged space I and provided with a series of curved deliverytubes, 0, terminating directly over the space between the rubber and the conical pan at the top.

In the operation of the apparatus the material is introduced into the hopper R, and from/thence distributed by the tubes r to the space between the conical rubber and pan at the top. In this space the quartz, grave], or sand is gradually broken up and pulverized as it approaches the lower portions of the cone and pan, the metallic particles being concentrated as the material works down, and rubbed or rolled together into pellets, instead of being disintegrated and ground to powder, as in the ordinary grinding or stamping mills. The auxiliary rubbing-surfaces at the bottom of the rubber and pan serve, further, to concentrate the particles of metal rolled together by the rubbing-surfaces f g, and solidify the same, so that they will be discharged at the lower part of the apparatus in well-defined pellets.

It will be observed that as thus constructed the arrangement of the conical rubber and pan is precisely the reverse of the ordinary position of the cone and shell grinding-mills, in which the grinding-cone and shell are constructed with a gradually-increasing flare and a diminishing grinding and pulverizin g space, commencing at the top and ending at the bottom.-

What I claim is 4 An apparatus for pulverizing metalliferous quartz, gravel, or sand, consisting of an inverted rotating conical rubber mounted within a conical pan, the sides of the rubber and pan converging toward each other from the top to a point near the bottom, from which point the space between the rubber and pan is uniform to the disch arge-openin g, whereby the silicious portions of the material are gradually broken up and reduced to powder within the converging space, while the metallic portions thereof are rolled into pellets within the uniform space, substantially as specified.

In testimony that I claim the foregoing I have hereunto set my hand in the presence of the subseribin g witnesses.

W. M. LILLIBRIDGE, A. P. T. BENITEAU. 

